Answer: Glycerol
Explanation: Saponification reacion is that kind of process in which fats or oils which have backbone of ester are converted into glycerol and soap in the presence of alkali by the process of extensive heating.
Thus due to the presence of alkali , soaps are salts of these fats and oils.
Thus the organic products of saponification include soap molecules and glycerol.
The chemical reaction in which saponification is explained is attached in the image .